{"id":41878,"date":"2026-04-09T13:12:02","date_gmt":"2026-04-09T13:12:02","guid":{"rendered":"https:\/\/direc.dk\/free-quantum-computing\/"},"modified":"2026-04-14T07:08:38","modified_gmt":"2026-04-14T07:08:38","slug":"free-quantum-computing","status":"publish","type":"post","link":"https:\/\/direc.dk\/da\/free-quantum-computing\/","title":{"rendered":"Free Quantum Computing"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"41878\" class=\"elementor elementor-41878 elementor-41859\" data-elementor-post-type=\"post\">\n\t\t\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-ad519e4 e-flex e-con-boxed e-con e-parent\" data-id=\"ad519e4\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;jet_parallax_layout_list&quot;:[]}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-1370ca0 e-con-full e-flex e-con e-child\" data-id=\"1370ca0\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[]}\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-867fa3a e-con-full e-flex e-con e-child\" data-id=\"867fa3a\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[]}\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-69d4a68 e-con-full e-flex e-con e-child\" data-id=\"69d4a68\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[]}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6364aa1 elementor-view-default elementor-widget elementor-widget-icon\" data-id=\"6364aa1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<i aria-hidden=\"true\" class=\"fas fa-user-graduate\"><\/i>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fa14535 elementor-widget elementor-widget-text-editor\" data-id=\"fa14535\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Quantum computing talks<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-96eabaf elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"96eabaf\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInDown&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Free quantum computing<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-79bc925 elementor-widget elementor-widget-text-editor\" data-id=\"79bc925\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Robin Kaarsgaard<\/p>\n<p>Associate Professor, University of Southern Denmark<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-ff87dd6 e-flex e-con-boxed e-con e-parent\" data-id=\"ff87dd6\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;jet_parallax_layout_list&quot;:[]}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-545801a e-con-full e-flex e-con e-child\" data-id=\"545801a\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[]}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9b2cf6c elementor-widget elementor-widget-video\" data-id=\"9b2cf6c\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\\/\\\/youtu.be\\\/dyKnzOkQNDE&quot;,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div class=\"elementor-video\"><\/div>\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-460ac25 e-flex e-con-boxed e-con e-parent\" data-id=\"460ac25\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[],&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-70e39b0 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"70e39b0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>Overview<\/h3>\n<h3><span style=\"font-size: 18px;\">What if we rethink quantum computing from the ground up?\u00a0<\/span><span style=\"font-size: 18px;\">In this talk, Robin Kaarsgaard Sales introduces a new model of quantum computing that replaces the traditional mathematical framework with discrete structures and category theory.\u00a0<\/span><span style=\"font-size: 18px;\">This approach offers new ways to understand, verify, and optimise quantum programs, and points toward more reliable and scalable quantum software in the future.<\/span><\/h3>\n<div><span style=\"font-size: 18px;\">\u00a0<\/span><\/div>\n<h3>Abstract<\/h3>\n<div>In this QUBITS Seminar, Associate Professor Robin Kaarsgaard Sales presents a \u201cfree\u201d model of quantum computing that rethinks the foundations of the field. Instead of relying on continuous postulates and linear algebra as the primary framework, the approach replaces them with discrete equations and category theory. This perspective isolates the source of quantum advantage and provides new tools for combinatorial optimisation, automated verification, and formal reasoning about quantum programs. The model can be interpreted as a programming language for quantum computers with the same expressive power as the standard circuit model, while offering stronger guarantees for correctness and reasoning.\u00a0<\/div>\n<div>Slides are available from this lecture:<\/div>\n<p><a href=\"https:\/\/direc.dk\/wp-content\/uploads\/2026\/04\/Slides_FreeQ.pdf\">Download slides<\/a><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-eb83cb6 e-flex e-con-boxed e-con e-parent\" data-id=\"eb83cb6\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[],&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-5eeade8 e-con-full e-flex e-con e-child\" data-id=\"5eeade8\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[]}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0aac225 elementor-widget elementor-widget-text-editor\" data-id=\"0aac225\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3><strong>Bio\u00a0<\/strong><\/h3>\n<div>Robin Kaarsgaard is associate professor of computer science at the University of Southern Denmark, where he works on quantum foundations and on developing the programming languages that will power future large-scale quantum computers.<\/div>\n<div>\u00a0<\/div>\n<div>He is principal investigator of the DFF: Sapere Aude project \u201cFunQ: Quantum Programming Beyond the Circuit Model,\u201d and associated with the Centre for Quantum Mathematics and Centre for Formal Methods and Future Computing.<\/div>\n<div>\u00a0<\/div>\n<div>Before accepting a position at the University of Southern Denmark, Kaarsgaard held positions at the University of Edinburgh and the University of Copenhagen, where he also received his PhD.<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-f130fc3 e-con-full e-flex e-con e-child\" data-id=\"f130fc3\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[]}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f195bfa elementor-widget elementor-widget-image\" data-id=\"f195bfa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"512\" height=\"513\" src=\"https:\/\/direc.dk\/wp-content\/uploads\/2026\/02\/Robin-Kaarsgaard-Sales.jpg\" class=\"attachment-large size-large wp-image-41876\" alt=\"\" srcset=\"https:\/\/direc.dk\/wp-content\/uploads\/2026\/02\/Robin-Kaarsgaard-Sales.jpg 512w, https:\/\/direc.dk\/wp-content\/uploads\/2026\/02\/Robin-Kaarsgaard-Sales-300x300.jpg 300w, https:\/\/direc.dk\/wp-content\/uploads\/2026\/02\/Robin-Kaarsgaard-Sales-150x150.jpg 150w\" sizes=\"(max-width: 512px) 100vw, 512px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-fe2d1d4 e-flex e-con-boxed e-con e-parent\" data-id=\"fe2d1d4\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[],&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-1f527b5 e-con-full e-flex e-con e-child\" data-id=\"1f527b5\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[]}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3e5ccc3 elementor-widget elementor-widget-text-editor\" data-id=\"3e5ccc3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h6><strong>this talk is Hosted by Quantum Campus Aarhus (QCA) and shared as part of DIREC\u2019s Quantum Computing Lecture series.<\/strong><\/h6>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Robin Kaarsgaard Sales, University of Southern Denmark<\/p>\n","protected":false},"author":3,"featured_media":41877,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[229],"tags":[],"class_list":["post-41878","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-quantum-talks"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Free Quantum Computing - DIREC<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/direc.dk\/da\/free-quantum-computing\/\" \/>\n<meta property=\"og:locale\" content=\"da_DK\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Free Quantum Computing - DIREC\" \/>\n<meta property=\"og:description\" content=\"Robin Kaarsgaard Sales, University of 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